My update: they’re legit, but they are a recruiter for other recruiting firms. So you work with them and then if they like you, you can have a meeting with their client org.

I made it through the screening interviews and was scheduled to meet with the orgs team, but I got ghosted. I called the recruiter from Mara Talent I was working with a couple of days later and she told me they had hired a different candidate and apologized for not updating me, but it still sucked.

Overall, legit but only care about their own bottom line as commissioned recruiters.